Physics Past Questions and Answers

A cell of emf 1.5V is connected in series with a 1â„¦ resistor and a current of 0.3A flows through the resistor. Find the internal resistance of the cell

A 4.0â„¦
B 3.0Ω
C 1.5â„¦
D 1.0â„¦

Question 37:

Which of the following obeys ohms laws?

A Electroytes
B Metals
C Diode
D Glass

Question 38:

A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N?

A N90
B N50
C N45
D N5

Question 39:

An electric device is rated 2000W, 250V. Calculate the maximum current it can take

A 9A
B 8A
C 7A
D 6A

Question 40:

When a charge moves through an electric circuit in the direction of an electric force, it

A Gains both potential and kinetic energy
B Gains potential energy and lose kinetic energy
C Loses potential energy and gains kinetic energy
D Loses both potential and kinetic energy